{
\def\sym#1{\ifmmode^{#1}\else\(^{#1}\)\fi}
\begin{tabular}{l*{6}{c}}
\hline\hline
          &\multicolumn{1}{c}{(1)}         &\multicolumn{1}{c}{(2)}         &\multicolumn{1}{c}{(3)}         &\multicolumn{1}{c}{(4)}         &\multicolumn{1}{c}{(5)}         &\multicolumn{1}{c}{(6)}         \\
\hline
ST        &   -0.059         &   -0.184         &   -0.137\sym{**} &   -0.297\sym{**} &    0.063         &    0.162         \\
          &  (0.059)         &  (0.118)         &  (0.065)         &  (0.121)         &  (0.093)         &  (0.200)         \\
ST\_ES2    &   -0.165\sym{**} &   -0.219\sym{*}  &                  &                  &                  &                  \\
          &  (0.069)         &  (0.129)         &                  &                  &                  &                  \\
ST\_TL     &                  &                  &    0.089         &    0.144         &                  &                  \\
          &                  &                  &  (0.068)         &  (0.138)         &                  &                  \\
ST\_edu    &                  &                  &                  &                  &   -0.173\sym{**} &   -0.403\sym{**} \\
          &                  &                  &                  &                  &  (0.087)         &  (0.191)         \\
\hline
\(N\)     &    16531         &    14142         &    16531         &    14142         &    16764         &    14357         \\
\(R^{2}\) &    0.046         &    0.047         &    0.045         &    0.047         &    0.046         &    0.048         \\
\hline\hline
\end{tabular}
}
